/*
 * ProGuard -- shrinking, optimization, obfuscation, and preverification of Java bytecode.
 *
 * Copyright (c) 2002-2018 GuardSquare NV
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write to the Free
 * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
package proguard.optimize.info;

import proguard.classfile.ProgramClass;
import proguard.classfile.util.SimplifiedVisitor;
import proguard.classfile.visitor.ClassVisitor;

/**
 * This ClassVisitor attaches a ProgramClassOptimizationInfo instance to every class that is not being kept that it
 * visits.
 *
 * @author Eric Lafortune
 */
public class ProgramClassOptimizationInfoSetter extends SimplifiedVisitor implements ClassVisitor {
    private final boolean overwrite;

    /**
     * Creates a new ProgramClassOptimizationInfoSetter. Existing visitor info is not overridden.
     */
    public ProgramClassOptimizationInfoSetter() {
        this(false);
    }

    /**
     * Creates a new ProgramClassOptimizationInfoSetter.
     *
     * @param overwrite true if existing visitor info should be overridden, false otherwise.
     */
    public ProgramClassOptimizationInfoSetter(boolean overwrite) {
        this.overwrite = overwrite;
    }

    // Implementations for MemberVisitor.

    public void visitProgramClass(ProgramClass programClass) {
        if (programClass.getVisitorInfo() == null || overwrite) {
            ProgramClassOptimizationInfo.setProgramClassOptimizationInfo(programClass);
        }
    }
}
